cash against shipping documents的意思|示意

凭单付款 与凭单付款 (cash against shipping documents) 有何区别？从英文表达中看得出二者是不同的，而我又解释不清楚二者到底有什么区别，请cash against bill of lading是指凭提单付...

凭单付现 ... certificate of quality 货物品质证书 cash against shipping documents 凭单付现 cash and delivery 付款交货,货到付款 ...

凭提单付款 ... case no. 箱号 cash against shipping documents 凭提单付款 cash against delivery 货到付款 ...

凭船单付现 cash against shipping documents 凭船单付现; 凭单付现; 凭运单付现 documents against payment 付款后交付单据; 付款交单,付款后交付货物; 付款交单，付款后交付货物